what would be ideal in the mean time would be for Captainsim ..or third party to alter the sound.xml file to make the soundpack into a 4 engine config,..at present it is unchanged kingair 2 eng hence why engines 3 & 4 sound weak. Having grown up on RNZAF Whenuapai Airbase and my Father flew C-130's I was around them all the time ,..no the kingair sound isnt close to the T54 Allison but would go a loooong way to making it sound full,..start ups are disappointing with very little in the way of start up sounds on #3 and #4. Surely it wouldnt take much to reconfig the xml ?